Marks obtains by all the students of class 12 are presented in a freqency distribution with classes of equal width. Let the median of this grouped data be 14 with median class interval 12-18 and media

Question

Marks obtains by all the students of class 12 are presented in a freqency distribution with classes of equal width. Let the median of this grouped data be 14 with median class interval 12-18 and median class frequency 12 . If the number of students whose marks are less than 12 is 18 , then the total number of students is

TestHub · Accepted Answer

​ median = ℓ + ( f 2 N ​ − F ​ ) × h = 12 + ( 12 2 N ​ − 18 ​ ) × 6 = 14 ⇒ ( 12 2 N ​ − 18 ​ ) × 6 = 2 2 N ​ − 18 = 4 ⇒ N = 44 ​

Mathematics - Statistics Question with Solution | TestHub

Options:

Doubts & Discussion